H5n1 Bird Flu Origin

The first human infection with an avian influenza a h5n1 virus is identified in hong kong. Although there are several types of bird flu h5n1 was the first avian influenza virus to infect humans. It is often referred to simply as bird flu or avian influenza even though it is only one of many subtypes.

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Global Spread Of H5n1 Wikipedia

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Global Spread Of H5n1 Wikipedia

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The virus was first detected in 1996 in geese in china.

H5n1 bird flu origin. The epidemic was not due to the introduction. Asian highly pathogenic avian influenza hpai a h5n1 virus occurs mainly in birds and is highly contagious among them. Genotype z emerged through reassortment in 2002 from earlier highly pathogenic genotypes of h5n1 that first appeared in china in 1996 in birds and in hong kong in 1997 in humans. They could adapt either through random mutations.

The outbreak was linked to handling. H5n1 avian influenza has some of the standard seasonal influenza symptoms such as high fever headache and muscle aches but people quickly become seriously ill and pneumonia difficulty. Rimantadine derived from amantadine is approved by the fda to treat influenza a. The first infection occurred in hong kong in 1997.

Like bird flu in 1997 and the sars epidemic of 2002 to 2003 the newest coronavirus has originated in the mainland this time in wuhan most likely in a market where exotic wild animals are sold. A bird adapted strain of h5n1 called hpai a h5n1 for highly pathogenic avian influenza virus of type a of subtype h5n1 is the highly pathogenic causative agent of h5n1 flu commonly known as avian influenza bird flu. The h5n1 viruses from human infections and the closely related avian viruses isolated in 2004 and 2005 belong to a single genotype often referred to as genotype z. While h5n1 and h7n9 strains can directly infect humans from birds these viruses have not yet adapted sufficiently to spread from human to human.

Trade through live bird markets and movement of domestic waterfowl. Flunet a web based flu surveillance tool is launched by who. Hpai asian h5n1 is especially deadly for poultry. It is enzootic maintained in the population in many bird populations especially in southeast asia.

By 2000 their host range had extended to domestic ducks which played a key role in the genesis of the 2003 04 outbreaks. An avian influenza h5n1 virus is first isolated from a farmed goose in china. Asian h5n1 viruses were first detected in domestic geese in southern china in 1996. The highly pathogenic influenza a virus subtype h5n1 is an emerging avian influenza virus that is causing global concern as a potential pandemic threat.